Yesterday Calvin posted a teaser for his new album, Funk Wav Bounces Vol. 1, on Twitter and Instagram, and unsurprisingly, it features a lot of collaborations, such as Ariana Grande, NickiMinaj and Pharell Williams... oh, and KATY FREAKIN' PERRY!!!

It's pretty shady considering how awful their break-up ended up being, and we all know the drama between Katy and Taylor.

Katy recently told EW in an interview that, "One thing to note is: You can't mistake kindness for weakness and don't come for me. Honestly, when women come together and they decide to unite, this world is going to be a better place. Period end of story. But, let me say this: Everything has a reaction or a consequence so don't forget about that, OK, honey."